May I offer a reference that I found in my library with regard to Major General Sir Robert Thomas Wilson as published in the Royal Military Calendar or Army Service and Commission Book, (containing the services and progresses of Promotion of the Generals, Lieutenant-Generals, Colonels, Lieutenantl-Colonels, and Majors of the Army according to seniority) with Details of the Principal Military Events of the Last Century, Third Edition in V volumes Vol III Printed by A.J. Valpy, Red Lion Court, Fleet Street. 1820. P. 320- 322
It is reasonably certain this noted officer is one and the same as the frequently referenced "Wilson" throughout these forum threads. From my read of the short compendium of his service in the above noted volume III. he was not sited as a specialist in artillery but rather a dragoon. He was a noted war correspondent with an interesting and diverse career. The reported diversity of his travels all over the continent would allow him to excel in generalizations and personal observations, rather than specialized military critiques in my opinion.
His works included: Account of the Campaigns in Poland in 1806 and 1807, with remarks on the character and composition of the Russian Army, 4to. 1811; and lastly a Sketch of the Military and political power of Russia.